Commit 7483e7a9 authored by Arnd Bergmann's avatar Arnd Bergmann Committed by Greg Kroah-Hartman

vme: bridges: reduce stack usage

With CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3, the stack usage in vme_fake
grows above the warning limit:

drivers/vme/bridges/vme_fake.c: In function 'fake_master_read':
drivers/vme/bridges/vme_fake.c:610:1: error: the frame size of 1160 bytes is larger than 1024 bytes [-Werror=frame-larger-than=]
drivers/vme/bridges/vme_fake.c: In function 'fake_master_write':
drivers/vme/bridges/vme_fake.c:797:1: error: the frame size of 1160 bytes is larger than 1024 bytes [-Werror=frame-larger-than=]

The problem is that in some configurations, each call to
fake_vmereadX() puts another variable on the stack.

Reduce the amount of inlining to get back to the previous state,
with no function using more than 200 bytes each.
Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20200107200610.3482901-1-arnd@arndb.deSigned-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent e2f9d739
......@@ -414,8 +414,9 @@ static void fake_lm_check(struct fake_driver *bridge, unsigned long long addr,
}
}
static u8 fake_vmeread8(struct fake_driver *bridge, unsigned long long addr,
u32 aspace, u32 cycle)
static noinline_for_stack u8 fake_vmeread8(struct fake_driver *bridge,
unsigned long long addr,
u32 aspace, u32 cycle)
{
u8 retval = 0xff;
int i;
......@@ -446,8 +447,9 @@ static u8 fake_vmeread8(struct fake_driver *bridge, unsigned long long addr,
return retval;
}
static u16 fake_vmeread16(struct fake_driver *bridge, unsigned long long addr,
u32 aspace, u32 cycle)
static noinline_for_stack u16 fake_vmeread16(struct fake_driver *bridge,
unsigned long long addr,
u32 aspace, u32 cycle)
{
u16 retval = 0xffff;
int i;
......@@ -478,8 +480,9 @@ static u16 fake_vmeread16(struct fake_driver *bridge, unsigned long long addr,
return retval;
}
static u32 fake_vmeread32(struct fake_driver *bridge, unsigned long long addr,
u32 aspace, u32 cycle)
static noinline_for_stack u32 fake_vmeread32(struct fake_driver *bridge,
unsigned long long addr,
u32 aspace, u32 cycle)
{
u32 retval = 0xffffffff;
int i;
......@@ -609,8 +612,9 @@ static ssize_t fake_master_read(struct vme_master_resource *image, void *buf,
return retval;
}
static void fake_vmewrite8(struct fake_driver *bridge, u8 *buf,
unsigned long long addr, u32 aspace, u32 cycle)
static noinline_for_stack void fake_vmewrite8(struct fake_driver *bridge,
u8 *buf, unsigned long long addr,
u32 aspace, u32 cycle)
{
int i;
unsigned long long start, end, offset;
......@@ -639,8 +643,9 @@ static void fake_vmewrite8(struct fake_driver *bridge, u8 *buf,
}
static void fake_vmewrite16(struct fake_driver *bridge, u16 *buf,
unsigned long long addr, u32 aspace, u32 cycle)
static noinline_for_stack void fake_vmewrite16(struct fake_driver *bridge,
u16 *buf, unsigned long long addr,
u32 aspace, u32 cycle)
{
int i;
unsigned long long start, end, offset;
......@@ -669,8 +674,9 @@ static void fake_vmewrite16(struct fake_driver *bridge, u16 *buf,
}
static void fake_vmewrite32(struct fake_driver *bridge, u32 *buf,
unsigned long long addr, u32 aspace, u32 cycle)
static noinline_for_stack void fake_vmewrite32(struct fake_driver *bridge,
u32 *buf, unsigned long long addr,
u32 aspace, u32 cycle)
{
int i;
unsigned long long start, end, offset;
......
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